公开(公告)号：US10770900B2

公开(公告)日：2020-09-08

申请号：US16262232

申请日：2019-01-30

Applicant: ABB Schweiz AG

Inventor： Lennart Harnefors

IPC: H02J3/34 ,  H02J3/00 ,  H02M7/5387 ,  H02M7/48 ,  H02J3/36 ,  G05B19/042

Abstract: A method of controlling a grid-connected voltage source converter, VSC, using power-synchronisation control, wherein the method includes: determining an active power control error, determining a VSC phase angle based on an integration of a sum including a scaled active power control error and a scaled imaginary part of a voltage of common coupling, determining a damping component based on a virtual damping resistance, a VSC current vector and a reference current vector for the VSC current vector, determining a voltage vector based on a VSC voltage magnitude and the damping component, transforming the voltage vector to a current vector, comparing a magnitude of the current vector with a maximum threshold current value, and in case the magnitude of the current vector is greater than the maximum threshold current value: reducing the magnitude of the current vector to a value below the maximum threshold current value to obtain a limited current vector, transforming the limited current vector to a limited voltage vector, controlling the VSC based on the VSC phase angle and the limited voltage vector, multiplying an imaginary part of a voltage of common coupling with a gain to obtain a scaled imaginary part of voltage of common coupling.

公开(公告)号：US10193469B2

公开(公告)日：2019-01-29

申请号：US15579399

申请日：2015-06-29

Applicant: ABB SCHWEIZ AG

Inventor： Lennart Harnefors ,  Tomas Tengner

IPC: H02M7/483 ,  H02J3/32 ,  G05B11/01

Abstract: A multi-level power converter for one or more phases includes one or more converter arms including a plurality of serial connected switching cells. Each switching cell includes a plurality of switching devices, a primary energy storage, a secondary energy storage and a first inductor. The switching devices are arranged to selectively provide a connection to the primary energy storage, wherein each switching cell includes a bridge circuit including the switching devices and the primary energy storage, a battery circuit connected to the bridge circuit and including the secondary energy storage, and an arm circuit providing a connection between two adjacent switching cells. The first inductor of each switching cell is arranged in the arm circuit.

公开(公告)号：US10170914B2

公开(公告)日：2019-01-01

申请号：US15756914

申请日：2015-09-01

Applicant: ABB SCHWEIZ AG

Inventor： Lennart Harnefors

IPC: H02M1/12 ,  H02J3/01 ,  H02J3/24 ,  H02M5/257 ,  G05B19/02 ,  H03L7/08

Abstract: A Voltage Source Converter control system for active damping of a resonance oscillation in the VSC includes a regular Phase-Locked Loop 2, and a slow PLL 3. The control system is arranged such that an imaginary part of the AD is obtainable from the slow PLL. The slow PLL is configured for having a closed-loop bandwidth which is less than a frequency, in a synchronous dq frame, of the resonance oscillation to be dampened.

公开(公告)号：US20240405704A1

公开(公告)日：2024-12-05

申请号：US18674130

申请日：2024-05-24

Applicant: ABB Schweiz AG

Inventor： Lennart Harnefors ,  Omer Ikram Ul Haq ,  Sjoerd Bosga

IPC: H02P23/04

Abstract: A method of reducing vibrations in an electric motor including a rotor and a stator, by means of an active vibration controller, AVC, the method includes: a) determining whether one of an angular rotational speed of the rotor and an angular stator frequency multiplied by two is within a critical range including a mechanical resonance frequency of a motor assembly including the electric motor and its load, b) i) setting an oscillating incremental torque angular frequency of the AVC to the angular rotational speed of the rotor if the angular rotational speed of the rotor is within the critical range, or ii) setting the oscillating incremental torque angular frequency to the angular stator frequency multiplied by two if the angular stator frequency multiplied by two is within the critical range, iii) generating an oscillating incremental torque reference using the AVC with the oscillating incremental torque angular frequency set in step b i) or b ii), and iv) controlling the electric motor based on a sum of the oscillating incremental torque reference and an electrical torque reference; or c) i) deactivating the AVC if the angular rotational speed of the rotor and the angular stator frequency multiplied by two is outside the critical range, and ii) controlling the electric motor based on the electrical torque reference.

公开(公告)号：US10270328B2

公开(公告)日：2019-04-23

申请号：US15548707

申请日：2015-02-04

Applicant: ABB SCHWEIZ AG

Inventor： Tomas Tengner ,  Amel Lachichi ,  Lennart Harnefors ,  Georgios Karmiris

IPC: H02M1/12 ,  H02M7/797 ,  H02J3/32 ,  H02M7/49 ,  H02J7/00 ,  H02M7/219 ,  H02M7/483 ,  H02J7/34

Abstract: A multilevel power converter includes at least one phase leg. The phase leg includes a plurality of cascaded chain link connected cells, each cell including a capacitor and two semiconductor switches in series, each with an anti-parallel connected diode. The plurality of cascaded chain link connected cells includes first and second cells which form a mirrored cell-pair such that the two semiconductor switches of each of the first and second cells are all connected in series with each other. The converter further includes an energy storage connected between the first and second cells.

公开(公告)号：US11239764B2

公开(公告)日：2022-02-01

申请号：US17323456

申请日：2021-05-18

Applicant: ABB Schweiz AG

Inventor： Lennart Harnefors ,  Massimo Bongiorno ,  Xiongfei Wang

IPC: H02M7/44 ,  G05B13/04 ,  H03L7/08

Abstract: A voltage-source converter, VSC, control system including an active damper, AD, a direct-voltage controller, DVC, and an alternating-voltage controller, AVC. The VSC control system is configured to control a VSC. The AVC is configured to regulate, using an integrator, an ac-bus voltage of the VSC by calculating a q component of a current reference vector for the VSC. The DVC is configured to regulate, using an integrator, a dc-bus voltage of the VSC by calculating a d component of the current reference vector. The AD is configured to amplify a vectoral difference between the ac-bus voltage and a corresponding reference, and to add the q component of the amplified vectoral difference to the q component of the current reference vector and to an input of the integrator of the AVC.

公开(公告)号：US20210367529A1

公开(公告)日：2021-11-25

申请号：US17323456

申请日：2021-05-18

Applicant: ABB Schweiz AG

Inventor： Lennart Harnefors ,  Massimo Bongiorno ,  Xiongfei Wang

IPC: H02M7/44 ,  H03L7/08 ,  G05B13/04

Abstract: A voltage-source converter, VSC, control system including an active damper, AD, a direct-voltage controller, DVC, and an alternating-voltage controller, AVC. The VSC control system is configured to control a VSC. The AVC is configured to regulate, using an integrator, an ac-bus voltage of the VSC by calculating a q component of a current reference vector for the VSC. The DVC is configured to regulate, using an integrator, a dc-bus voltage of the VSC by calculating a d component of the current reference vector. The AD is configured to amplify a vectoral difference between the ac-bus voltage and a corresponding reference, and to add the q component of the amplified vectoral difference to the q component of the current reference vector and to an input of the integrator of the AVC.

公开(公告)号：US10389129B2

公开(公告)日：2019-08-20

申请号：US16190926

申请日：2018-11-14

Applicant: ABB Schweiz AG

Inventor： Lennart Harnefors ,  Lidong Zhang

IPC: H02M7/48 ,  H02J3/34 ,  H02M7/5387

Abstract: A method of controlling a grid-connected voltage source converter, VSC, using power-synchronization control, wherein the method includes: determining a VSC current vector (i) based on a VSC phase angle (θ) which is determined based on an integration of a power control error, determining an active power producing current component (idref) of a reference current vector (iref) based on an active power reference (Pref) for the VSC, determining the reference current vector (iref) based on the active power producing current component (idref), determining a damping component based on a virtual damping resistance (Ra), the reference current vector (iref) and the VSC current vector (i), determining a voltage vector (v) based on a VSC voltage magnitude (V) and the damping component, and controlling the VSC based on the voltage vector (v).

公开(公告)号：US20190157870A1

公开(公告)日：2019-05-23

申请号：US16190926

申请日：2018-11-14

Applicant: ABB Schweiz AG

Inventor： Lennart Harnefors ,  Lidong Zhang

IPC: H02J3/34

CPC classification number: H02J3/34 ,  H02M7/53871

Abstract: A method of controlling a grid-connected voltage source converter, VSC, using power-synchronisation control, wherein the method includes: determining a VSC current vector (i) based on a VSC phase angle (θ) which is determined based on an integration of a power control error, determining an active power producing current component (idref) of a reference current vector (iref) based on an active power reference (Pref) for the VSC, determining the reference current vector (iref) based on the active power producing current component (idref), determining a damping component based on a virtual damping resistance (Ra), the reference current vector (iref) and the VSC current vector (i), determining a voltage vector (v) based on a VSC voltage magnitude (V) and the damping component, and controlling the VSC based on the voltage vector (v).

公开(公告)号：US20190265663A1

公开(公告)日：2019-08-29

申请号：US16262232

申请日：2019-01-30

Applicant: ABB Schweiz AG

Inventor： Lennart Harnefors

IPC: G05B19/042 ,  H02J3/00

Abstract: A method of controlling a grid-connected voltage source converter, VSC, using power-synchronisation control, wherein the method includes: determining an active power control error, determining a VSC phase angle based on an integration of a sum including a scaled active power control error and a scaled imaginary part of a voltage of common coupling, determining a damping component based on a virtual damping resistance, a VSC current vector and a reference current vector for the VSC current vector, determining a voltage vector based on a VSC voltage magnitude and the damping component, transforming the voltage vector to a current vector, comparing a magnitude of the current vector with a maximum threshold current value, and in case the magnitude of the current vector is greater than the maximum threshold current value: reducing the magnitude of the current vector to a value below the maximum threshold current value to obtain a limited current vector, transforming the limited current vector to a limited voltage vector, controlling the VSC based on the VSC phase angle and the limited voltage vector, multiplying an imaginary part of a voltage of common coupling with a gain to obtain a scaled imaginary part of voltage of common coupling.